Its a '73. I called Remington and verified as well.
'73 was obviously the change over year...my records show I had a 700 Varmint in 25-06 with a XX date code...Dec. '73, it had the solid cut checkered stock....they changed to skip line checkering about 1980-81,..I've owned 700 BDL's that dated to both '80 and '81 with both styles of checkering.